Sponsored Content
Top Forums UNIX for Dummies Questions & Answers Delete lines with a word and their above lines Post 302834593 by RavinderSingh13 on Friday 19th of July 2013 10:40:20 AM
Old 07-19-2013
Thanks a lot Yoda, I have no hesitation to say you are one of the champs for awk. It's really pleasure to read/follow your posts. Smilie



Thanks,
R. Singh
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

delete lines containing a specific word in afile

Hi, Please suggest how to write a shell script which delets all the lines containing the word unix in the files supplied as argument in the shell. (4 Replies)
Discussion started by: sireesha9
4 Replies

2. Shell Programming and Scripting

search a word and delete consecutive lines below it

Hi all coders, I need a help to process some data. I have this file, 3 09/21/08 03:32:07 started undef mino Oracle nmx004.wwdc.numonyx.co m Message Text : The Oracle session with the PID 1103 has a CPU time consuming of 999.00... (3 Replies)
Discussion started by: vikas027
3 Replies

3. Shell Programming and Scripting

How to delete lines in a file that have duplicates or derive the lines that aper once

Input: a b b c d d I need: a c I know how to get this (the lines that have duplicates) : b d sort file | uniq -d But i need opossite of this. I have searched the forum and other places as well, but have found solution for everything except this variant of the problem. (3 Replies)
Discussion started by: necroman08
3 Replies

4. UNIX for Dummies Questions & Answers

How get only required lines & delete the rest of the lines in file

Hiiii I have a file which contains huge data as a.dat: PDE 1990 1 9 18 51 28.90 24.7500 95.2800 118.0 6.1 0.0 BURMA event name: 010990D time shift: 7.3000 half duration: 5.0000 latitude: 24.4200 longitude: 94.9500 depth: 129.6000 Mrr: ... (7 Replies)
Discussion started by: reva
7 Replies

5. Shell Programming and Scripting

How to delete all lines before a specific word?

Let's say we have a file containing: alllllsadfsdasdf qwdDDDaassss ccxxcxc#2222 dssSSSSddDDDD D1Sqn2NYOHgTI Hello Alex ssS@3 Ok, and let's say we want to delete all words from D1Sqn2NYOHgTI and back, this means to delete the words (and the lines of them) : alllllsadfsdasdf... (2 Replies)
Discussion started by: hakermania
2 Replies

6. Shell Programming and Scripting

need to delete all lines from a group of files except the 1st 2 lines

Hello, I have a group of text files with many lines in each file. I need to delete all the lines in each and only leave 2 lines in each file. (3 Replies)
Discussion started by: script_op2a
3 Replies

7. Shell Programming and Scripting

Search the word to be deleted and delete lines above this word starting from P1 to P3

Hi, I have to search a word in a text file and then I have to delete lines above from the word searched . For eg suppose the file is like this: Records P1 10,23423432 ,77:1 ,234:2 P2 10,9089004 ,77:1 ,234:2 ,87:123 ,9898:2 P3 456456 P1 :123,456456546 P2 abc:324234 (2 Replies)
Discussion started by: vsachan
2 Replies

8. UNIX for Advanced & Expert Users

In a huge file, Delete duplicate lines leaving unique lines

Hi All, I have a very huge file (4GB) which has duplicate lines. I want to delete duplicate lines leaving unique lines. Sort, uniq, awk '!x++' are not working as its running out of buffer space. I dont know if this works : I want to read each line of the File in a For Loop, and want to... (16 Replies)
Discussion started by: krishnix
16 Replies

9. Shell Programming and Scripting

search and replace, when found, delete multiple lines, add new set of lines?

hey guys, I tried searching but most 'search and replace' questions are related to one liners. Say I have a file to be replaced that has the following: $ cat testing.txt TESTING AAA BBB CCC DDD EEE FFF GGG HHH ENDTESTING This is the input file: (3 Replies)
Discussion started by: DeuceLee
3 Replies

10. Shell Programming and Scripting

Sed/awk to delete single lines that aren't touching other lines

Hello, I'm trying to figure out how to use sed or awk to delete single lines in a file. By single, I mean lines that are not touching any other lines (just one line with white space above and below). Example: one two three four five six seven eight I want it to look like: (6 Replies)
Discussion started by: slimjbe
6 Replies
English(3pm)						 Perl Programmers Reference Guide					      English(3pm)

NAME
English - use nice English (or awk) names for ugly punctuation variables SYNOPSIS
use English; use English qw( -no_match_vars ) ; # Avoids regex performance penalty # in perl 5.16 and earlier ... if ($ERRNO =~ /denied/) { ... } DESCRIPTION
This module provides aliases for the built-in variables whose names no one seems to like to read. Variables with side-effects which get triggered just by accessing them (like $0) will still be affected. For those variables that have an awk version, both long and short English alternatives are provided. For example, the $/ variable can be referred to either $RS or $INPUT_RECORD_SEPARATOR if you are using the English module. See perlvar for a complete list of these. PERFORMANCE
NOTE: This was fixed in perl 5.20. Mentioning these three variables no longer makes a speed difference. This section still applies if your code is to run on perl 5.18 or earlier. This module can provoke sizeable inefficiencies for regular expressions, due to unfortunate implementation details. If performance matters in your application and you don't need $PREMATCH, $MATCH, or $POSTMATCH, try doing use English qw( -no_match_vars ) ; . It is especially important to do this in modules to avoid penalizing all applications which use them. perl v5.18.2 2014-01-06 English(3pm)
All times are GMT -4. The time now is 05:22 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy